The impelling demand for materials able to operate at temperature above 2000 °C pushes the scientific research towards continuous search of materials possessing a combination of properties more and more challenging. C/SiC composites are currently the most used materials for aerospace applications, such as nose cones, leading edges and rocket nozzles, owing to their excellent high-temperature strength, high thermal conductivity, low coefficient of thermal expansion, good thermal shock resistance and good ablation resistance but their operational limit is around 1600 °C. Thus the development of a new generation of Ceramic Matrix Composites (CMCs) working at higher temperature is a key goal that could be achieved by combining a chemically and mechanically robust and oxidation resistant matrix with a reinforcing phase, such as CFs. In this context, advanced ceramic materials, boride and carbide of early transition metals, named Ultra-High Temperature Ceramics (UHTCs) may be the right option as the constituent matrix of these new composites. ISTEC activities have been recently focused on fabrication of Cf/ZrB2-SiC composites which have the potential to operate above 2000 °C. This lecture illustrates processing techniques and characterization of UHTCMCs focusing on the aspects of matrix densification, fiber/matrix interface, thermal shock resistance and oxidation behavior. Acknowledgements: This work has received funding from the European Union's Horizon 2020 "Research and innovation programme" under grant agreement N°685594 (C3HARME). References: [1] L. Zoli, A. Vinci, P. Galizia, C. Melandri, D. Sciti, On the thermal shock resistance and mechanical properties of novel unidirectional UHTCMCs for extreme environments (2018) Scientific Reports, 8, n° 9148. Open acess [2] L. Zoli L, P. Galizia , L. Silvestroni, D. Sciti, Synthesis of group IV and V metal diboride nanocrystals via borothermal reduction with sodium borohydride. J. Am. Ceram. Soc. 2018; https://doi.org/10.1111/jace.15401. Open acess [3] P. Galizia, S. Failla, L. Zoli, D. Sciti. Tough salami-inspired Cf/ZrB2 UHTCMCs produced by electrophoretic deposition. Journal of the European Ceramic Society 38 [2] 403-409 (2018). [4] A. Vinci, L. Zoli, E. Landi, D. Sciti. Oxidation behavior of a continuous carbon fibre reinforced ZrB2-SiC composite. Corrosion Science, 123 [15] 129-138 (2017) (Open Access) [5] L. Zoli, D. Sciti. Efficacy of a ZrB2 - SiC matrix in protecting C fibres from oxidation in novel UHTCMC materials. Materials & Design 113, 207-213 (2017)

Ultra-high temperature Ceramic matrix composites for extreme environments

Zoli L;Vinci A;Galizia P;Sciti D
2018

Abstract

The impelling demand for materials able to operate at temperature above 2000 °C pushes the scientific research towards continuous search of materials possessing a combination of properties more and more challenging. C/SiC composites are currently the most used materials for aerospace applications, such as nose cones, leading edges and rocket nozzles, owing to their excellent high-temperature strength, high thermal conductivity, low coefficient of thermal expansion, good thermal shock resistance and good ablation resistance but their operational limit is around 1600 °C. Thus the development of a new generation of Ceramic Matrix Composites (CMCs) working at higher temperature is a key goal that could be achieved by combining a chemically and mechanically robust and oxidation resistant matrix with a reinforcing phase, such as CFs. In this context, advanced ceramic materials, boride and carbide of early transition metals, named Ultra-High Temperature Ceramics (UHTCs) may be the right option as the constituent matrix of these new composites. ISTEC activities have been recently focused on fabrication of Cf/ZrB2-SiC composites which have the potential to operate above 2000 °C. This lecture illustrates processing techniques and characterization of UHTCMCs focusing on the aspects of matrix densification, fiber/matrix interface, thermal shock resistance and oxidation behavior. Acknowledgements: This work has received funding from the European Union's Horizon 2020 "Research and innovation programme" under grant agreement N°685594 (C3HARME). References: [1] L. Zoli, A. Vinci, P. Galizia, C. Melandri, D. Sciti, On the thermal shock resistance and mechanical properties of novel unidirectional UHTCMCs for extreme environments (2018) Scientific Reports, 8, n° 9148. Open acess [2] L. Zoli L, P. Galizia , L. Silvestroni, D. Sciti, Synthesis of group IV and V metal diboride nanocrystals via borothermal reduction with sodium borohydride. J. Am. Ceram. Soc. 2018; https://doi.org/10.1111/jace.15401. Open acess [3] P. Galizia, S. Failla, L. Zoli, D. Sciti. Tough salami-inspired Cf/ZrB2 UHTCMCs produced by electrophoretic deposition. Journal of the European Ceramic Society 38 [2] 403-409 (2018). [4] A. Vinci, L. Zoli, E. Landi, D. Sciti. Oxidation behavior of a continuous carbon fibre reinforced ZrB2-SiC composite. Corrosion Science, 123 [15] 129-138 (2017) (Open Access) [5] L. Zoli, D. Sciti. Efficacy of a ZrB2 - SiC matrix in protecting C fibres from oxidation in novel UHTCMC materials. Materials & Design 113, 207-213 (2017)
2018
Istituto di Scienza, Tecnologia e Sostenibilità per lo Sviluppo dei Materiali Ceramici - ISSMC (ex ISTEC)
UHTCMC
C3harme
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/344211
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